Update thin to v1.6.2

Author: Chris Hunt

github-auth.gemspec

@@ -27,7 +27,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rake',           '~> 10.1.1'
   spec.add_development_dependency 'rspec',          '~> 2.14.1'
   spec.add_development_dependency 'sinatra',        '~> 1.4.4'
-  spec.add_development_dependency 'thin',           '~> 1.6.1'
+  spec.add_development_dependency 'thin',           '~> 1.6.2'
 
   spec.add_runtime_dependency 'faraday', '~> 0.9.0'
   spec.add_runtime_dependency 'thor',    '~> 0.18.1'